#include <stdio.h>
#include <string.h>

void RemoveString(char *dest, const char *src)
{
    char *str = strstr(dest, src);
    while(str != NULL)
    {
        char *back = str + strlen(src);
        while(*back != '\0')
        {
            *str++ = *back++;
        }
        *str = '\0';
        str = strstr(dest, src); 
    }
    
}


int main()
{
    char str[] = "zhangsan,zhangyi,zhangwu";
    RemoveString(str, "zhang");
    printf("%s\n",str);
    return 0;
}